Revert of Reland: Refactor DeviceMotionEventPump to use //device/generic_sensor instead of //device/sensors

device/generic_sensor/platform_sensor_provider_android.cc

Index: device/generic_sensor/platform_sensor_provider_android.cc
diff --git a/device/generic_sensor/platform_sensor_provider_android.cc b/device/generic_sensor/platform_sensor_provider_android.cc
index c9abbdf322f4d6cef106fb5db19f02705981acad..05a008a2cfb3982b1f2026e0cbb1cf9c5db4623e 100644
--- a/device/generic_sensor/platform_sensor_provider_android.cc
+++ b/device/generic_sensor/platform_sensor_provider_android.cc
@@ -36,10 +36,8 @@
   ScopedJavaLocalRef<jobject> sensor = Java_PlatformSensorProvider_createSensor(
       env, j_object_.obj(), static_cast<jint>(type));
 
-  if (!sensor.obj()) {
+  if (!sensor.obj())
     callback.Run(nullptr);
-    return;
-  }
 
   scoped_refptr<PlatformSensorAndroid> concrete_sensor =
       new PlatformSensorAndroid(type, std::move(mapping), this, sensor);